EP2873570B1 - Vorrichtung zur reinigung einer fahrzeugmontierten kamera - Google Patents

Vorrichtung zur reinigung einer fahrzeugmontierten kamera Download PDF

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Publication number
EP2873570B1
EP2873570B1 EP13816249.0A EP13816249A EP2873570B1 EP 2873570 B1 EP2873570 B1 EP 2873570B1 EP 13816249 A EP13816249 A EP 13816249A EP 2873570 B1 EP2873570 B1 EP 2873570B1
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EP
European Patent Office
Prior art keywords
cleaning liquid
distal end
air
cleaning
nozzle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13816249.0A
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English (en)
French (fr)
Other versions
EP2873570A1 (de
EP2873570A4 (de
Inventor
Toshimichi GOKAN
Yonosuke NISHIOKU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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Filing date
Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority claimed from PCT/JP2013/068716 external-priority patent/WO2014010579A1/ja
Publication of EP2873570A1 publication Critical patent/EP2873570A1/de
Publication of EP2873570A4 publication Critical patent/EP2873570A4/de
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Publication of EP2873570B1 publication Critical patent/EP2873570B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
    • B05B1/262—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors
    • B05B1/267—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors the liquid or other fluent material being deflected in determined directions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0876—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form parallel jets constituted by a liquid or a mixture containing a liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0892—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point the outlet orifices for jets constituted by a liquid or a mixture containing a liquid being disposed on a circle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/06—Wipers or the like, e.g. scrapers characterised by the drive
    • B60S1/08—Wipers or the like, e.g. scrapers characterised by the drive electrically driven
    • B60S1/0818—Wipers or the like, e.g. scrapers characterised by the drive electrically driven including control systems responsive to external conditions, e.g. by detection of moisture, dirt or the like
    • B60S1/0822—Wipers or the like, e.g. scrapers characterised by the drive electrically driven including control systems responsive to external conditions, e.g. by detection of moisture, dirt or the like characterized by the arrangement or type of detection means
    • B60S1/0833—Optical rain sensor
    • B60S1/0844—Optical rain sensor including a camera
    • B60S1/0848—Cleaning devices for cameras on vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
    • B60S1/48—Liquid supply therefor
    • B60S1/52—Arrangement of nozzles; Liquid spreading means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/56—Cleaning windscreens, windows or optical devices specially adapted for cleaning other parts or devices than front windows or windscreens
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/08—Waterproof bodies or housings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/51—Housings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80—Camera processing pipelines; Components thereof
    • H04N23/81—Camera processing pipelines; Components thereof for suppressing or minimising disturbance in the image signal generation
    • H04N23/811—Camera processing pipelines; Components thereof for suppressing or minimising disturbance in the image signal generation by dust removal, e.g. from surfaces of the image sensor or processing of the image signal output by the electronic image sensor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/02—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery

Definitions

  • the present invention relates to a cleaning device for cleaning a vehicle-mounted camera mounted, for example, at the rear portion of a vehicle to capture images of the rear of the vehicle.
  • a vehicle-mounted camera which is, for example, mounted at the rear of a vehicle and captures surrounding images to monitor a vehicle traveling behind the vehicle or obstructions existing in the surroundings of the vehicle
  • foreign substances such as water droplets and mud may be attached on a lens serving as an image-capturing surface, for example, during rainy weather.
  • the vehicle-mounted camera cannot clearly capture the surrounding image.
  • US 2009/2005250533 A1 discloses a washer nozzle having a camera spray outlet for spraying a washer fluid on the lens of a camera and a camera duct for carrying the washer fluid to the camera spray outlet.
  • the washer nozzle further has an air inlet for taking in air and an air duct extending from the air inlet to the camera duct. After discharging the washer fluid, moisture still adhering to the lens is blown off by the air flowing through the air duct.
  • JP 2012 035654 A a fluid (such as compressed air) is injected by a pump into the flow path of a nozzle device.
  • the nozzle device has central and side jetting ports for jetting the fluid toward the lens surface of a convex lens.
  • JP 2001 171491 A needs a large amount of cleaning liquid to be sprayed over the lens surface, causing a problem of consuming the large amount of cleaning liquid.
  • the present invention has been made to solve the problem of the conventional technique as described above, and an object of the present invention is to provide a cleaning device for a vehicle-mounted camera, which can reliably clean the lens surface with a small amount of cleaning liquid.
  • the present application provides a cleaning device for a vehicle-mounted camera integrated into a vehicle comprising: a nozzle provided on the upper surface of the body of the camera and having a discharge port which protrudes from the front side of the camera and from which a cleaning liquid and a compressed air are discharged downward toward the lens surface, a cleaning liquid path that guides the cleaning liquid to the discharge port, and an air passage that guides the compressed air to the discharge port, wherein a distal end portion of the cleaning liquid path merges with a distal end portion of the air passage to form a merging flow path, and the discharge port is provided at the distal end of the merging flow path; a cleaning-liquid delivery section that can be driven to deliver the cleaning liquid to the cleaning liquid path of the nozzle through a cleaning liquid pipe; and a compressed-air delivery section that can be driven to deliver the compressed air to the air passage of the nozzle through an air pipe, wherein by driving the cleaning-liquid delivery section for a short period of time and by driving at the same time the compressed
  • Fig. 1 is a block diagram illustrating a configuration of a cleaning device for a vehicle-mounted camera according to an embodiment of the present invention.
  • a cleaning device 100 includes a cleaning liquid reservoir tank 2 (primary tank) that stores a cleaning liquid, a cleaning liquid pump 3 (cleaning-liquid delivery section) that delivers the cleaning liquid stored in the cleaning liquid reservoir tank 2, an air pump 5 (compressed-air delivery section) that delivers a compressed air, and a nozzle 7 for discharging the cleaning liquid, the compressed air, or a mixture of the cleaning liquid and the compressed air to a lens surface of a camera 1.
  • a cleaning liquid reservoir tank 2 primary tank
  • cleaning liquid pump 3 cleaning-liquid delivery section
  • an air pump 5 compressed-air delivery section
  • nozzle 7 for discharging the cleaning liquid, the compressed air, or a mixture of the cleaning liquid and the compressed air to a lens surface of a camera 1.
  • a cleaning liquid pipe 4 that guides the cleaning liquid delivered by the cleaning liquid pump 3 to a secondary tank 13 that stores the cleaning liquid
  • an air pipe 6 that guides the compressed air delivered by the air pump 5 to the nozzle 7 of a nozzle unit 22, and a controller 8 (control section) that controls operations of the cleaning liquid pump 3 and the air pump 5.
  • Fig. 2(a) is a perspective view illustrating the cleaning device 100 according to this embodiment in a state where the device is installed to a camera 1 mounted at the rear portion of a vehicle
  • Fig. 2(b) is a diagram illustrating the cleaning device 100 illustrated in Fig. 2(a) when viewed from the direction "A.”
  • the nozzle unit 22 that is fixed at the rear portion of the vehicle and cleans a lens surface 1a is provided in the vicinity of a side portion of the camera 1 fixed at the rear portion of the vehicle.
  • the nozzle unit 22 includes the nozzle 7 from which a cleaning liquid and compressed air discharge toward the lens surface 1a, and a cap 7d.
  • the nozzle 7 has a distal end portion provided with two discharge ports 10a and 10b from which the cleaning liquid and the compressed air discharge.
  • configuration is made such that, by discharging the cleaning liquid and the compressed air from the discharge ports 10a and 10b of the nozzle 7 toward the lens surface 1a, foreign substances attached on the lens surface 1a are removed.
  • Fig. 3 is a partially-sectioned perspective view illustrating the nozzle unit 22 illustrated in Fig. 2(a) .
  • the nozzle 7, provided on the distal end side of the nozzle unit 22, has the central portion provided with an air passage 12 that guides the compressed air, and at both ends in the left and right sides of this air passage 12, cleaning liquid paths 11a and 11b that guide the cleaning liquid are provided.
  • the distal end of each of the air passage 12 and the cleaning liquid paths 11a and 11b is bent at a substantially right angle so as to face the lens surface 1a of the camera 1.
  • a secondary tank 13 that temporarily stores the cleaning liquid is provided upstream of the cleaning liquid paths 11a and 11b.
  • a plug 13a for connecting the cleaning liquid pipe 4 and a plug 13b for connecting the air pipe 6 are provided on the side portion of this secondary tank 13.
  • the plug 13b is connected with the air passage 12 through a flow path provided below the secondary tank 13. In other words, the compressed air guided through the plug 13b into the nozzle unit 22 is led directly into the air passage 12.
  • the plug 13a is connected with the secondary tank 13, and the cleaning liquid supplied through this plug 13a is led into the secondary tank 13 from above.
  • the pipe extending from the plug 13a and connected with the secondary tank 13 is disposed in the vertical direction as indicated by the reference sign 23 in Fig. 6(b) . Details of this pipe 23 will be described later.
  • the bottom portion of the secondary tank 13 is connected with two lines of the cleaning liquid paths 11a and 11b, and is disposed at a position higher than the discharge ports 10a and 10b.
  • the compressed air delivered by the air pump 5 illustrated in Fig. 1 is led into the air passage 12 of the nozzle 7 through the air pipe 6, whereas the cleaning liquid delivered by the cleaning liquid pump 3 is stored in the secondary tank 13, and then, is led into the two lines of the cleaning liquid paths 11 a and 11b.
  • the secondary tank 13 has the volume smaller than the cleaning liquid reservoir tank 2 illustrated in Fig. 1 .
  • Fig. 4(b) is an explanatory view illustrating a detailed configuration of the distal end portion of the nozzle, and is a sectional view illustrating a portion of the reference sign P1 in Fig. 4(a) .
  • the air passage 12 is provided at the center, and the two cleaning liquid paths 11a and 11b are provided so as to be located at both sides of the air passage 12.
  • the cleaning liquid paths according to this embodiment are formed by two lines of the cleaning liquid paths 11a and 11b provided so as to be located at both sides of this air passage 12.
  • the cleaning liquid paths 11 a and 11b are connected to distal end portions 15a and 15b, respectively.
  • the area of a flow path of each of the distal end portions 15a and 15b is smaller than the area of a flow path of each of the cleaning liquid paths 11 a and 11b.
  • the speed of the cleaning liquid flowing through each of the cleaning liquid paths 11a and 11b increases when it flows through each of the distal end portions 15a and 15b.
  • the distal end of the air passage 12 is bifurcated into two distal end portions 14a (first distal end portion) and 14b (second distal end portion).
  • the area of a flow path of each of the distal end portions 14a and 14b is smaller than the area of a flow path of the air passage 12.
  • the speed of the compressed air flowing through the air passage 12 increases when it flows through each of the distal end portions 14a and 14b.
  • the distal end portion 15a of the cleaning liquid path 11a merges with one distal end portion 14a of the air passage 12 to form a merging flow path 16a (first merging flow path), the distal end of which forms the discharge port 10a (see Fig. 2(b) ).
  • the distal end portion 15b of the cleaning liquid path 11b which is the other side, merges with the other distal end portion 14b of the air passage 12 to form a merging flow path 16b (second merging flow path), the distal end of which forms the discharge port 10b (see Fig. 2(b) ).
  • the merging flow path 16a and the merging flow path 16b are disposed in a manner such that the distance between the two paths increases toward the distal end side thereof.
  • a jetting surface 7a which is a distal end portion of the nozzle 7, is configured to protrude more forward than a side surface 7b (nozzle distal-end surface) in the vicinity of the jetting surface 7a.
  • This configuration makes it possible to prevent the cleaning liquid jetting from the discharge ports 10a and 10b from being attached on the side surface 7b of the nozzle 7. More specifically, it is possible to prevent the cleaning liquid from being attached on areas indicated by the reference signs P2 and P3 in Fig. 5 .
  • Fig. 6(b) is a sectional view illustrating the nozzle unit 22 illustrated in Fig. 6(a) and taken along the line D-D.
  • a small space is provided between a bottom surface 7c of the nozzle 7 and an upper surface 1b of the body of the camera 1. Furthermore, the width of this space is configured so as to be gradually narrower toward the inside of the space.
  • a supply port 13c for supplying the cleaning liquid into the secondary tank 13 is provided on the upper part of the secondary tank 13 provided upstream of the nozzle 7, and to this supply port 13c, the pipe 23 placed in the vertical direction is provided. Then, this pipe 23 is connected with the plug 13a illustrated in Fig. 3 . With the pipe 23 being placed in the vertical direction, it is possible to prevent the cleaning liquid staying in the pathway from irregularly entering the secondary tank 13 in the case where supply of the cleaning liquid by the cleaning liquid pump 3 (see Fig. 1 ) is stopped. In other words, it is possible to prevent the cleaning liquid from entering the secondary tank 13 due to vibration in a state where the secondary tank 13 is empty.
  • a check valve 24 is provided on the upper surface of the secondary tank 13.
  • the check valve 24 is, for example, an umbrella valve, and is configured such that, if the pressure within the secondary tank 13 becomes negative pressure, the valve is opened to introduce the outside air through an air vent 25, and if the pressure within the secondary tank 13 becomes positive pressure, the valve is closed to prevent release to the outside.
  • the secondary tank 13 becomes negative pressure, the outside air enters the secondary tank 13, whereby it is possible to prevent the cleaning liquid from entering through the cleaning liquid pipe 4.
  • the secondary tank 13 has the check valve that prevents air from leaking from the secondary tank 13 to the outside, and allows air to enter the secondary tank 13 from the outside.
  • the bottom surface 13d of the secondary tank 13 is sloped so as to descend toward the front side (left side in the drawing).
  • an outlet pipe of the secondary tank 13 as well as the cleaning liquid paths 11a and 11b and the air passage 12 (see Fig. 3 ) provided to the nozzle 7 are similarly configured to be sloped so as to descend toward the front side.
  • the cleaning device 100 there are three modes including a pressurized cleaning mode in which the cleaning liquid and the compressed air are caused to jet to clean the lens surface 1a, an air blow mode in which only the compressed air is delivered to remove water droplets attached on the lens surface 1a, and a continuous water supply mode in which the cleaning liquid is intermittently dropped on the lens surface 1a to make it difficult for dirt to be attached on the lens surface 1a.
  • a pressurized cleaning mode in which the cleaning liquid and the compressed air are caused to jet to clean the lens surface 1a
  • an air blow mode in which only the compressed air is delivered to remove water droplets attached on the lens surface 1a
  • a continuous water supply mode in which the cleaning liquid is intermittently dropped on the lens surface 1a to make it difficult for dirt to be attached on the lens surface 1a.
  • the pressurized cleaning mode will be described.
  • the air pump 5 is driven. More specifically, as illustrated in Fig. 7(a) and Fig. 7(b) , both of the cleaning liquid pump 3 and the air pump 5 are driven at a time t0.
  • the cleaning liquid stored in the cleaning liquid reservoir tank 2 (primary tank) is supplied through the cleaning liquid pipe 4 to the secondary tank 13, and the cleaning liquid is stored in this secondary tank 13.
  • the period of time from t0 to t1 is set to be a period of time required for fully filling the secondary tank 13 with the cleaning liquid by the cleaning liquid pump 3.
  • the compressed air delivered from the air pump 5 passes through the air pipe 6, and is introduced into the air passage 12 within the nozzle 7 illustrated in Fig. 3 . Then, the compressed air is delivered from the distal end portions 14a and 14b illustrated in Fig. 4(b) to the merging flow paths 16a and 16b. At this time, since the area of the flow path of each of the distal end portions 14a and 14b is set to be smaller than that of the air passage 12, the speed of the air flow increases in each of the distal end portions 14a and 14b.
  • the cleaning liquid jets from the merging flow paths 16a and 16b in a form of a mist in conjunction with the compressed air, the cleaning liquid jets from the merging flow paths 16a and 16b in a form of a mist.
  • the cleaning liquid in the form of a mist can be caused to jet from the discharge ports 10a and 10b serving as the distal ends of the merging flow paths 16a and 16b, and be sprayed over the lens surface 1a. This makes it possible to remove the foreign substance attached on the lens surface 1a with the synergistic effect of the cleaning liquid in the form of a mist and the air pressure.
  • the pressurized cleaning mode is a mode in which the air pump 5 (compressed-air delivery section) is driven; the compressed air is caused to jet from the discharge ports 10a and 10b; the cleaning liquid supplied to the cleaning liquid paths 11a and 11b is suctioned with the negative pressure occurring as a result of the jet of the compressed air to jet the cleaning liquid from the discharge ports 10a and 10b; and the lens surface 1a is cleaned with the compressed air and cleaning liquid jetted.
  • the cleaning liquid pump 3 cleaning-liquid delivery section
  • the air pump 5 compressed-air delivery section
  • the cleaning liquid path is made into the negative pressure to make the cleaning liquid into the form of a mist and cause it to jet, whereby the lens surface can be effectively cleaned with the small amount of cleaning liquid.
  • This pressurized cleaning mode is suitable for applications that remove foreign substances such as mud attached on the lens surface 1a.
  • the air blow mode In the air blow mode, only the air pump 5 is driven in a state where the cleaning liquid is not stored in the secondary tank 13. More specifically, the cleaning liquid pump 3 is stopped as illustrated in Fig. 8(a) , and the air pump 5 is driven for a period of time from t10 to t11 (for example, two seconds) as illustrated in Fig. 8(b) . Then, the compressed air passes through the distal end portions 14a and 14b of the air passage 12 and the merging flow paths 16a and 16b to jet from the discharge ports 10a and 10b, and is sprayed over the lens surface 1a. As a result, the water droplets attached on the lens surface 1a of the camera 1 can be removed by the air pressure.
  • the pipe 23 connected with the secondary tank 13 is placed in a substantially vertical direction as illustrated in Fig. 6(b) . Furthermore, the bottom surface 13d of the secondary tank 13 is placed at a position higher than the discharge ports 10a and 10b, and the bottom surface 13d of the secondary tank 13 and the pipe for the cleaning liquid are sloped downward, whereby the cleaning liquid does not remain in the secondary tank 13 and its pipe.
  • the compressed air jets, and the inside of the secondary tank 13 becomes negative pressure, it is possible to prevent the cleaning liquid from being introduced into the merging flow paths 16a and 16b, and it is possible to prevent the cleaning liquid from mixing with the compressed air.
  • the air blow mode is a mode in which the delivery of the cleaning liquid by the cleaning liquid pump 3 (cleaning-liquid delivery section) is stopped; the compressed air is delivered to the air pipe 6 by the air pump 5 (compressed-air delivery section) in a state where supply of the cleaning liquid is stopped; and the compressed air is caused to jet from the discharge ports 10a and 10b, whereby the lens surface 1a is cleaned.
  • the air blow mode is suitable to remove the water droplets attached on the lens surface 1a.
  • the continuous water supply mode the cleaning liquid is supplied from the cleaning liquid pump 3 into the secondary tank 13, and furthermore, the air pump 5 is intermittently driven, whereby the cleaning liquid is dropped on the lens surface 1a. More specifically, as illustrated in Fig. 9(a) and Fig. 9(b) , the cleaning liquid is stored in the secondary tank 13 by driving the cleaning liquid pump 3 for a period of time from t20 to t21, and then, at a time t22, the air pump 5 is intermittently driven plural times within a period of time T1, whereby the small amount of the cleaning liquid is dropped on the lens surface 1a. For example, by setting the period of time from t22 to t23 to 30 msec, the small amount (for example, 0.25 cc) of the cleaning liquid is dropped on the lens surface 1a for each drop.
  • the continuous water supply mode is a mode in which the compressed air is caused to intermittently jet from the discharge ports 10a and 10b for plural times, and the cleaning liquid is suctioned with the negative pressure occurring due to the jet of the compressed air to cause the cleaning liquid to jet from the discharge ports 10a and 10b onto the lens surface 1a.
  • This continuous water supply mode is suitable to maintain the lens surface 1a in the wet state at the time of rainy weather to prevent the contaminants from depositing on the lens surface 1a before it happens.
  • Each of the cleaning modes described above may be set by the driver of the vehicle through manual operations. Alternately, it may be possible to detect dirt states of the camera 1 or weather states, and automatically select a cleaning mode according to the result of detection, thereby doing cleaning.
  • the air passage 12 is provided to the distal end portion of the nozzle 7, the cleaning liquid paths 11a and 11b are provided in the vicinity of this air passage 12, and the distal end portions 14a and 14b of the air passage 12 and the distal end portions 15a and 15b of the cleaning liquid paths 11a and 11b are merged with each other.
  • the cleaning liquid made into the form of a mist can be caused to jet over the entire lens surface 1a of the camera 1, whereby it is possible to uniformly clean the lens surface 1a.
  • the jetting surface 7a of the nozzle 7 protrudes more forward than the side surface 7b.
  • the jetting surface 7a of the nozzle 7 protrudes more forward than the side surface 7b.
  • the embodiment described above employs the configuration in which the compressed air and the cleaning liquid are merged at the distal end portion of the nozzle 7.
  • the present invention is not limited to this, and it is possible to employ a configuration in which the air passage and the cleaning liquid paths are disposed so as to be close to each other, and when the compressed air is discharged from the air passage, the cleaning liquid supplied from the cleaning liquid path is made into the form of a mist using the negative pressure at this time, thereby jetting it.
  • the distal end portions 14a and 15a and the distal end portions 14b and 15b, each of which is illustrated in Fig. 4(b) are not merged, and jetting is performed in a state where they are proximate to each other.
  • the present invention can be used to effectively clean the lens surface of the camera mounted on the vehicle with a small amount of cleaning liquid.

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Claims (4)

  1. Reinigungsvorrichtung (100) für eine Fahrzeug-Bordkamera (1), die in ein Fahrzeug integriert ist, wobei sie eine Linsen-Oberfläche (1a) einer an einem Fahrzeug installierten Kamera (1) reinigt, und die Reinigungsvorrichtung (100) umfasst:
    eine Düse (7), die sich an der oberen Fläche des Gehäuses der Kamera (1) befindet und die aufweist:
    eine Ausstoßöffnung (10a, 10b), die von der Vorderseite der Kamera vorsteht, und über die eine Reinigungsflüssigkeit sowie Druckluft nach unten auf die Linsen-Oberfläche (1a) zu ausgestoßen werden,
    einen Reinigungsflüssigkeits-Weg (11a, 11 b), der die Reinigungsflüssigkeit zu der Ausstoßöffnung (10a, 10b) leitet, und
    einen Luftkanal (12), der die Druckluft zu der Ausstoßöffnung (10a, 10b) leitet, wobei
    ein vorderer Endabschnitt (15a, 15b) des Reinigungsflüssigkeits-Weges (11a, 11b) mit einem vorderen Endabschnitt (14a, 14b) des Luftkanals (12) zusammenläuft, so dass ein zusammenlaufender Strömungsweg (16a, 16b) gebildet wird, und
    die Ausstoßöffnung (10a, 10b) sich an dem vorderen Ende des zusammenlaufenden Strömungsweges (16a, 16b) befindet;
    einen Teilabschnitt (3) für Zufuhr von Reinigungsflüssigkeit, der so angesteuert werden kann, dass er dem Reinigungsflüssigkeits-Weg (11a, 11 b) der Düse (7) über ein Reinigungsflüssigkeits-Rohr (4) die Reinigungsflüssigkeit zuführt; und
    einen Teilabschnitt (5) für Zufuhr von Druckluft, der so angesteuert werden kann, dass er dem Luftkanal (12) der Düse (7) über ein Luftrohr (6) die Druckluft zuführt, wobei
    wenn der Teilabschnitt (3) für Zufuhr von Reinigungsflüssigkeit über einen kurzen Zeitraum angesteuert wird und gleichzeitig der Teilabschnitt (5) für Zufuhr von Druckluft angesteuert wird, die dem Reinigungsflüssigkeits-Weg (11 a, 11 b) zugeleitete Reinigungsflüssigkeit mit dem Unterdruck angesaugt wird, der an dem vorderen Endabschnitt (15a, 15b) des Reinigungsflüssigkeits-Weges (11a, 11 b) aufgrund des Druckluftstrahls auftritt, und sie in Form eines Nebels über die Ausstoßöffnungen (10a, 10b) auf die Linsen-Oberfläche (1a) gesprüht wird.
  2. Reinigungsvorrichtung (100) für eine Fahrzeug-Bordkamera (1) nach Anspruch 1, wobei der Reinigungsflüssigkeits-Weg (11a, 11 b) zwei Leitungen von Reinigungsflüssigkeitswegen (11a, 11 b) enthält, die so angeordnet sind, dass sie sich an beiden Seiten des Luftkanals (12) befinden;
    der vordere Endabschnitt (14a, 14b) des Luftkanals (12) sich in zwei Leitungen gabelt, die durch einen ersten oberen Endabschnitt (14a) und einen zweiten oberen Endabschnitt (14b) gebildet werden;
    ein vorderer Endabschnitt (15a) eines der Reinigungsflüssigkeits-Wege (11a, 11 b) und der erste obere Endabschnitt (14a) des Luftkanals (12) zusammenlaufen und einen ersten zusammenlaufenden Strömungsweg (16a) bilden, und ein vorderer Endabschnitt (15b) des anderen der Reinigungsflüssigkeits-Wege (11a, 11b) und der zweite obere Endabschnitt (14b) des Luftkanals (12) zusammenlaufen und einen zweiten zusammenlaufenden Strömungsweg (16b) bilden; und
    ein vorderes Ende des ersten zusammenlaufenden Strömungsweges (16a) und ein vorderes Ende des zweiten zusammenlaufenden Strömungsweges (16b) so angeordnet sind, dass ein Abstand zwischen ihnen zu einer Seite des vorderen Endes hin zunimmt.
  3. Reinigungsvorrichtung (100) für eine Fahrzeug-Bordkamera (1) nach Anspruch 1 oder Anspruch 2, wobei
    die Ausstoßöffnung (10a, 10b) der Düse (7) weiter nach vorn vorsteht als eine vordere Endfläche (7b) der Düse.
  4. Reinigungsvorrichtung (100) für eine Fahrzeug-Bordkamera (1) nach einem der Ansprüche 1 bis 3, wobei
    die Düse (7) so angeordnet ist, dass ein vorgegebener Zwischenraum zwischen der Düse (7) und einem Gehäuse der Kamera (1) vorhanden ist.
EP13816249.0A 2012-07-11 2013-07-09 Vorrichtung zur reinigung einer fahrzeugmontierten kamera Active EP2873570B1 (de)

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JP2012155357 2012-07-11
PCT/JP2013/068716 WO2014010579A1 (ja) 2012-07-11 2013-07-09 車載カメラの洗浄装置

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EP2873570A1 (de) 2015-05-20
CN104470769A (zh) 2015-03-25
EP2873570A4 (de) 2015-08-12
MX2015000267A (es) 2015-04-10
US20150166021A1 (en) 2015-06-18
MX341944B (es) 2016-09-08
MY154241A (en) 2015-05-18
JPWO2014010579A1 (ja) 2016-06-23
US9796361B2 (en) 2017-10-24
BR112015000702A2 (pt) 2019-11-05
BR112015000702B1 (pt) 2021-08-17
JP6090319B2 (ja) 2017-03-08
RU2566166C1 (ru) 2015-10-20
CN104470769B (zh) 2016-01-20

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